I guess I'm just a belt and suspenders sort of guy (if everything in the xover is bang on then the driver has "room" to move both ways)!

I found a local music store that has the CH3 and went to buy them. I wasn't impressed! The CH3 is in two halves and is screwed together--the H290 is a single mold. The H290 is thicker and more solid than the CH3. So I'm sticking with the H290.

I had the guy at the hardware store cut me two 4" long pieces of 4" diameter PVC, so I'm ready to rock!

I'm glad I went with the box part of the Theater 7 Pi as a bass reflex because my house mate isn't moving in so I might go with the Theater 7's in his room (I don't have the space for corner horns in my room).

Are you able to characterize the sound of the 7Pi vs the 4Pi? I'd like to hear your comments, to characterize the corner horn 'sound' in relation to the bass reflex 'sound'.

Thanks again for all your help,
Jeff